include/net/bluetooth/l2cap.h

   1 /*
   2    BlueZ - Bluetooth protocol stack for Linux
   3    Copyright (C) 2000-2001 Qualcomm Incorporated
   4
   5    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License version 2 as
   9    published by the Free Software Foundation;
  10
  11    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  12    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  13    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  14    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  15    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  16    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19
  20    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  21    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  22    SOFTWARE IS DISCLAIMED.
  23 */
  24
  25 #ifndef __L2CAP_H
  26 #define __L2CAP_H
  27
  28 /* L2CAP defaults */
  29 #define L2CAP_DEFAULT_MTU       672
  30 #define L2CAP_DEFAULT_FLUSH_TO  0xFFFF
  31
  32 #define L2CAP_CONN_TIMEOUT      (40000) /* 40 seconds */
  33 #define L2CAP_INFO_TIMEOUT      (4000)  /*  4 seconds */
  34
  35 /* L2CAP socket address */
  36 struct sockaddr_l2 {
  37         sa_family_t     l2_family;
  38         __le16          l2_psm;
  39         bdaddr_t        l2_bdaddr;
  40         __le16          l2_cid;
  41 };
  42
  43 /* L2CAP socket options */
  44 #define L2CAP_OPTIONS   0x01
  45 struct l2cap_options {
  46         __u16 omtu;
  47         __u16 imtu;
  48         __u16 flush_to;
  49         __u8  mode;
  50 };
  51
  52 #define L2CAP_CONNINFO  0x02
  53 struct l2cap_conninfo {
  54         __u16 hci_handle;
  55         __u8  dev_class[3];
  56 };
  57
  58 #define L2CAP_LM        0x03
  59 #define L2CAP_LM_MASTER         0x0001
  60 #define L2CAP_LM_AUTH           0x0002
  61 #define L2CAP_LM_ENCRYPT        0x0004
  62 #define L2CAP_LM_TRUSTED        0x0008
  63 #define L2CAP_LM_RELIABLE       0x0010
  64 #define L2CAP_LM_SECURE         0x0020
  65
  66 /* L2CAP command codes */
  67 #define L2CAP_COMMAND_REJ 0x01
  68 #define L2CAP_CONN_REQ    0x02
  69 #define L2CAP_CONN_RSP    0x03
  70 #define L2CAP_CONF_REQ    0x04
  71 #define L2CAP_CONF_RSP    0x05
  72 #define L2CAP_DISCONN_REQ 0x06
  73 #define L2CAP_DISCONN_RSP 0x07
  74 #define L2CAP_ECHO_REQ    0x08
  75 #define L2CAP_ECHO_RSP    0x09
  76 #define L2CAP_INFO_REQ    0x0a
  77 #define L2CAP_INFO_RSP    0x0b
  78
  79 /* L2CAP structures */
  80 struct l2cap_hdr {
  81         __le16     len;
  82         __le16     cid;
  83 } __attribute__ ((packed));
  84 #define L2CAP_HDR_SIZE          4
  85
  86 struct l2cap_cmd_hdr {
  87         __u8       code;
  88         __u8       ident;
  89         __le16     len;
  90 } __attribute__ ((packed));
  91 #define L2CAP_CMD_HDR_SIZE      4
  92
  93 struct l2cap_cmd_rej {
  94         __le16     reason;
  95 } __attribute__ ((packed));
  96
  97 struct l2cap_conn_req {
  98         __le16     psm;
  99         __le16     scid;
 100 } __attribute__ ((packed));
 101
 102 struct l2cap_conn_rsp {
 103         __le16     dcid;
 104         __le16     scid;
 105         __le16     result;
 106         __le16     status;
 107 } __attribute__ ((packed));
 108
 109 /* connect result */
 110 #define L2CAP_CR_SUCCESS    0x0000
 111 #define L2CAP_CR_PEND       0x0001
 112 #define L2CAP_CR_BAD_PSM    0x0002
 113 #define L2CAP_CR_SEC_BLOCK  0x0003
 114 #define L2CAP_CR_NO_MEM     0x0004
 115
 116 /* connect status */
 117 #define L2CAP_CS_NO_INFO      0x0000
 118 #define L2CAP_CS_AUTHEN_PEND  0x0001
 119 #define L2CAP_CS_AUTHOR_PEND  0x0002
 120
 121 struct l2cap_conf_req {
 122         __le16     dcid;
 123         __le16     flags;
 124         __u8       data[0];
 125 } __attribute__ ((packed));
 126
 127 struct l2cap_conf_rsp {
 128         __le16     scid;
 129         __le16     flags;
 130         __le16     result;
 131         __u8       data[0];
 132 } __attribute__ ((packed));
 133
 134 #define L2CAP_CONF_SUCCESS      0x0000
 135 #define L2CAP_CONF_UNACCEPT     0x0001
 136 #define L2CAP_CONF_REJECT       0x0002
 137 #define L2CAP_CONF_UNKNOWN      0x0003
 138
 139 struct l2cap_conf_opt {
 140         __u8       type;
 141         __u8       len;
 142         __u8       val[0];
 143 } __attribute__ ((packed));
 144 #define L2CAP_CONF_OPT_SIZE     2
 145
 146 #define L2CAP_CONF_MTU          0x01
 147 #define L2CAP_CONF_FLUSH_TO     0x02
 148 #define L2CAP_CONF_QOS          0x03
 149 #define L2CAP_CONF_RFC          0x04
 150
 151 #define L2CAP_CONF_MAX_SIZE     22
 152
 153 struct l2cap_conf_rfc {
 154         __u8       mode;
 155         __u8       txwin_size;
 156         __u8       max_transmit;
 157         __le16     retrans_timeout;
 158         __le16     monitor_timeout;
 159         __le16     max_pdu_size;
 160 } __attribute__ ((packed));
 161
 162 #define L2CAP_MODE_BASIC        0x00
 163 #define L2CAP_MODE_RETRANS      0x01
 164 #define L2CAP_MODE_FLOWCTL      0x02
 165
 166 struct l2cap_disconn_req {
 167         __le16     dcid;
 168         __le16     scid;
 169 } __attribute__ ((packed));
 170
 171 struct l2cap_disconn_rsp {
 172         __le16     dcid;
 173         __le16     scid;
 174 } __attribute__ ((packed));
 175
 176 struct l2cap_info_req {
 177         __le16      type;
 178 } __attribute__ ((packed));
 179
 180 struct l2cap_info_rsp {
 181         __le16      type;
 182         __le16      result;
 183         __u8        data[0];
 184 } __attribute__ ((packed));
 185
 186 /* info type */
 187 #define L2CAP_IT_CL_MTU     0x0001
 188 #define L2CAP_IT_FEAT_MASK  0x0002
 189 #define L2CAP_IT_FIXED_CHAN 0x0003
 190
 191 /* info result */
 192 #define L2CAP_IR_SUCCESS    0x0000
 193 #define L2CAP_IR_NOTSUPP    0x0001
 194
 195 /* ----- L2CAP connections ----- */
 196 struct l2cap_chan_list {
 197         struct sock     *head;
 198         rwlock_t        lock;
 199         long            num;
 200 };
 201
 202 struct l2cap_conn {
 203         struct hci_conn *hcon;
 204
 205         bdaddr_t        *dst;
 206         bdaddr_t        *src;
 207
 208         unsigned int    mtu;
 209
 210         __u32           feat_mask;
 211
 212         __u8            info_state;
 213         __u8            info_ident;
 214
 215         struct timer_list info_timer;
 216
 217         spinlock_t      lock;
 218
 219         struct sk_buff *rx_skb;
 220         __u32           rx_len;
 221         __u8            rx_ident;
 222         __u8            tx_ident;
 223
 224         __u8            disc_reason;
 225
 226         struct l2cap_chan_list chan_list;
 227 };
 228
 229 #define L2CAP_INFO_CL_MTU_REQ_SENT      0x01
 230 #define L2CAP_INFO_FEAT_MASK_REQ_SENT   0x04
 231 #define L2CAP_INFO_FEAT_MASK_REQ_DONE   0x08
 232
 233 /* ----- L2CAP channel and socket info ----- */
 234 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
 235
 236 struct l2cap_pinfo {
 237         struct bt_sock  bt;
 238         __le16          psm;
 239         __u16           dcid;
 240         __u16           scid;
 241
 242         __u16           imtu;
 243         __u16           omtu;
 244         __u16           flush_to;
 245         __u8            sec_level;
 246         __u8            role_switch;
 247         __u8            force_reliable;
 248
 249         __u8            conf_req[64];
 250         __u8            conf_len;
 251         __u8            conf_state;
 252         __u8            conf_retry;
 253
 254         __u8            ident;
 255
 256         __le16          sport;
 257
 258         struct l2cap_conn       *conn;
 259         struct sock             *next_c;
 260         struct sock             *prev_c;
 261 };
 262
 263 #define L2CAP_CONF_REQ_SENT     0x01
 264 #define L2CAP_CONF_INPUT_DONE   0x02
 265 #define L2CAP_CONF_OUTPUT_DONE  0x04
 266 #define L2CAP_CONF_CONNECT_PEND 0x80
 267
 268 #define L2CAP_CONF_MAX_RETRIES  2
 269
 270 void l2cap_load(void);
 271
 272 #endif /* __L2CAP_H */